Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa8b5dcfb5341fb0…

MALICIOUS

PDF

32.4 KB Created: 2020-11-02 11:51:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-06
MD5: 115ce92e80db93064f8a9ba17a2d9b0f SHA-1: 7af47857d50e3490b1b4863a7d567378448d8410 SHA-256: aa8b5dcfb5341fb07a0846e4683b6bcb6bb4fc69512a1b585b2ab87c9043f4dd
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://gettraff.ru/wb?keyword=holt%20mcdougal%20avancemos%202%20textbook%20answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367279/normal_5f8c439e13a5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402533/normal_5f912f406bca7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6250/4855/files/samsung_un60h6350_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9492/5219/files/bardock_hd_android_wallpaper.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5149/0713/files/doxavobokirowijitur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/1586/0135/files/25886416913.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7556/6752/files/touching_spirit_bear_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/rodrigo_lara_bonilla_wife.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9125/4176/files/burlington_edison_school_district.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4023/4902/files/dmv_permit_study_guide_ct.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004099.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4099 5776 bytes
SHA-256: c9dd502e44bbe77cc8b8de26c8e7838fbbec49896d2962489e66a56f8eba18c0
font_01_sfnt_off00005449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5449 10016 bytes
SHA-256: 74f159183dca6cf20a1357a7d0bae66682fcaf6ac05ab82f6310a7c520ff8afe